g,.0.264 mmol) was placed in the bottom of a quartz hot tube. The tube was packed with ceramic saddles and sublimer maintained at -78°was attached. A high vacuum was applied and the hot tube was heated to 650°. The solid was then sublimed up the hot tube by heating with a silicone oil bath between 250 and 290°. Thirty milliliters of silica gel was added to the sublimate which was dissolved in methylene chloride. The solvent was removed on a rotary evaporator, and the solids were mounted on a column of silica gel (600 ml dry volume) in hexane. The column was then eluted with hexane gradually enriched with methylene chloride giving eight fractions identified as orange 4,10,1,7-(C5H5)2Co2C2B8Hio (XI) (105 mg, 0.029 mmol, 11%), orange 2,8,1,12-(C5H5)2Co2C2BsHio (XII) (90 mg, 0.0238 mmol, 9%), 4,12,1,7-(CsH5)2Co2C2B8Hio (XIII) (10 mg, 0.0026 mmol, 1.0%), red 2,10,1,7-(CsHshO^BgHm (XIV) (28 mg, 0.093 mmol, 3%), purplish 2,9,1,12-(C5H5)2Co2C2B8Hio (XV) (10 mg, 0.0026 mmol, 1%), orange 2,5,1,7-(C5H5)2Co2C2B8Hio (XVI) (9 mg, 0.0024 mmol, 0.9%), orange 2,4,1,7-(C5H5)2Co2C2B8H,0 (X) (15 mg, 396 mmol, 1.5%), and red 3,6,1,2-(C5H5)2Co2C2B8Hi0 (IX) (70 mg, 0.0185 mmol, 7%).